HTTP protocol interceptor is a routine that implements a specific aspect of
the HTTP protocol. Usually protocol interceptors are expected to act upon
one specific header or a group of related headers of the incoming message
or populate the outgoing message with one specific header or a group of
related headers.

Protocol Interceptors can also manipulate content entities enclosed with messages.
Usually this is accomplished by using the 'Decorator' pattern where a wrapper
entity class is used to decorate the original entity.

Protocol interceptors must be implemented as thread-safe. Similarly to
servlets, protocol interceptors should not use instance variables unless
access to those variables is synchronized.

Method Detail

process

Processes a request.
On the client side, this step is performed before the request is
sent to the server. On the server side, this step is performed
on incoming messages before the message body is evaluated.